#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
using namespace std;
const int N = 110;
int a[N];
int dp[N], f[N];
int n;
int main()
{
    cin >> n;
    int ret = 0;
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i];
    }
    for (int i = 1; i <= n; i++)
    {
        dp[i] = 1;
        for (int j = 1; j < i; j++)
        {
            if (a[j] < a[i])
                dp[i] = max(dp[i], dp[j] + 1);
        }
    }
    for (int i = n; i >= 1; i--)
    {
        f[i] = 1;
        for (int j = n; j > i; j--)
        {
            if (a[j] < a[i])
                f[i] = max(f[i], f[j] + 1);
        }
    }
    for (int i = 1; i <= n; i++)
    {
        ret = max(ret, f[i] + dp[i] - 1);
    }
    cout << n - ret;
    return 0;
}